Dueling, Everyone meets in the river and takes turns 1v1 against the enemy hero. Once someone dies, the next hero replaces them from their team. And so on. - Courtesy of IceDawg - check link for more ideas related

You could throw Kayle in there as a nuker since his AP ratio's are 1:1 as well as his healing however, the combination of Shen's taunt ability with the AOE ult combo's of Amumu stun with Blitz and Nunu's is ridiculously overpowering. The chasing power of Nunu as well as his MS/AS boost to Sion for his healing ult is great too.

All in all, the damage output from this group as well as it's survivability and balance in utility/CC makes it the best group in my opinion.

I heard about that! Sounded like it went well other than a little mis-communication in the part about everyone picking randoms. Glad to hear everyone had fun despite that! I'll go ahead and add that to the list.

It's honestly great all-around... you learn other characters (this compounds into many, many different beneficial learning areas of LoL, including anticipation of moves [understanding mana pool/cooldown time/etc], understanding of other characters abilities, etc).. you're thrown out of your comfort zone.. and a lot more..

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